instanceof survives non-object variables, but crashes on non-object constants.
| From: | Andreas Hennings | Date: | Sat, 09 Dec 2017 06:28:41 +0000 |
| Subject: | instanceof survives non-object variables, but crashes on non-object constants. | ||
| Groups: | php.internals | ||
| Request: | Send a blank email to internals+get-101273@lists.php.net to get a copy of this message | ||
The following (https://3v4l.org/A2Tp6) is ok, it simply returns false:
$x = 1;
$x instanceof \stdClass;
The following (https://3v4l.org/IdSBu) gives a fatal error:
1 instanceof \stdclass;
t think this behavior is inconsistent, and we should consider changing it.
There are two options, but only one is BC.
- Let 1 instanceof \stdClass return false, instead of crashing. -> seems BC
- Let $x instanceof \stdClass crash, if $x is not an object. -> BC break.
So it seems the first would the option we should take.
This is also what hhvm does, according to https://3v4l.org/IdSBu.